JPS59221370A - Method for removing excess adhesive and apparatus therefor - Google Patents

Abstract

PURPOSE:To remove easily an excess adhesive, by filling a thermosetting adhesive in mutual superposed parts of jointed parts of a car body panel, semicuring the excess adhesive part protruding from the superposed parts by blowing hot air, and scraping the adhesive with a scraping means. CONSTITUTION:A thermosetting adhesive 14 is filled in mutual superposed parts of jointed parts 12 and 13 of a car body panel, and the excess adhesive part (14a') protruding from the superposed parts (13a) and (12b) is semicured one after another by applying a flat blowing part (7c) of a hot air discharging nozzle 6 thereto and moving the flat blowing part (7c) in the direction of arrow (A) while blowing the hot air thereon. On the other hand, the semicured part (14b') is cut from the adhesive layer (14') by the blade part (10b) of a scraper 10 according to the movement of the hot air discharging nozzle 6, and scraped off from above the panel 13. EFFECT:There is no trouble due to solvents as solvents are not used.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for bonding automobile body parts, etc., and an apparatus therefor.

The purpose is to provide a method and device for easily removing the adhesive that protrudes from the joints when bonding the joints of automobile body panels, etc. using a thermosetting adhesive. be.

Thermosetting adhesives such as one-component epoxy adhesives are used as structural adhesives for automobile bodies. This type of adhesive is in the form of a highly viscous paste, and it is difficult to apply a thin layer to the parts to be adhered. It often protrudes to the outer periphery. Since it becomes difficult to remove the protruding adhesive after it is heated and cured, it is necessary to remove it in advance. In this case, since it is a viscous paste and cannot be completely removed with a spatula or rag, a solvent is generally used to remove it. However, the use of solvents poses problems in terms of work hygiene and safety, and the solvent may degrease the adhesive area around the area where it is removed, making it more likely to rust, or the solvent may enter the adhesive surface, causing the adhesive to swell. There was a risk of deterioration. Also, using a rag was cumbersome and wasteful.

In this invention, after applying adhesive to mutual bonding seams, the part where the adhesive sticks out is heated with high-temperature hot air, and the heated part is moved along the seam while semi-curing the adhesive. The object of the present invention is to provide an adhesive removal method and an apparatus thereof, in which a scraping means for scraping off the adhesive follows the movement of the heated area.

Embodiments of the present invention will be described below based on the drawings.

In the figure, a nozzle 1 has a narrow horizontally elongated discharge port 2, and a blower (not shown) is connected to the nozzle 1 through a hose 3.
This narrow horizontal cross section is used to exhaust the air sent from the inside.

A heater section 4 is interposed in the air blowing path from the hose 3 to the nozzle 1, and air passes through this section to generate hot air at a predetermined high temperature.

In this embodiment, the heater section 4 also serves as a handle section for gripping with the hand, as shown by the broken line in use. The heater cord 5 is the heater power source (not shown).
It is connected to the. A scraping member 6 is fixed to the nozzle 1, and its blade part 7 is adjusted and fixed at a position adjacent to the discharge port 2 at a distance from each other. The nozzle 1 and the scraping member 6 are used while holding the heater part 4 and moving in the longitudinal direction of the discharge port 2 as shown by an arrow 8.

The work procedure and operation in the second configuration will be explained below. First, each panel 9 of the automobile body. In order to bond the IOs to each other, a paste-like thermosetting adhesive 12 is applied to the seam 11 and the IOs are separately pressed. At this time, the adhesive 12 protrudes to the outer periphery of the seam. The protruding portion 13 is shown on the front side of the figure. Next, a blower (not shown) is operated to discharge air from the nozzle 1 through the hose 3, and when the heater section 4 is energized, this becomes hot hot air. Grip the heater part 4, align the longitudinal direction 3- of the discharge port 2 of the nozzle 1 with the direction along the protruding part 13 of the adhesive 12, bring it close to it, and while blowing hot air, move the nozzle 1 in the direction indicated by the arrow 8. move in the direction. This moving speed is adjusted as appropriate so that the protruding portion 13 of the adhesive 12 is brought into a desired semi-cured state by the hot air. The scraping member 6 is at the seam 11
In this step, the semi-cured protruding portion 13 is scraped off by the blade portion 7 while being guided by the edge of the panel 9 and the upper surface of the panel 10.

The figure shows the work in progress.

The main curing of the adhesive is then performed separately.

Note that the blade portion 7 of the scraping member 6 is located on the panel 1 in the figure.
However, depending on the shape of the member to be bonded, the material of the adhesive, etc., consider making the shape so that it touches along the edge of panel 9 in the figure as appropriate. be done.

Although the above embodiment shows the case of manual operation, it is also possible to incorporate this into a copying traveling device or a robot.
In that case, in order to dispose of the scraped adhesive, it is necessary to install a vacuum suction device or the like in a position that will not affect the hot air.

=4- As described above, according to the present invention, there is no need to use a solvent to remove the adhesive that has unnecessarily protruded, and therefore there is no fear of various problems caused by the solvent.

Since the adhesive is scraped off in a semi-cured and gelled state, it is easy to scrape off, and the device is simple and unnecessary adhesive can be reliably removed.

[Brief explanation of the drawing]

The figure is a schematic perspective view of an apparatus showing an embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Nozzle, 4... Heater part 5 6... Scraping member (scraping means), 9.10...
・Panel, I2...Adhesive. First amendment by Party A: (1:l'I1 issue) June 1, 1980 Director General of the Patent Office 1, Case Description 1982 Patent Application No. 095084 2, Title of Invention Surplus Adhesive Removal Method and What is the relationship between the device 3, the person making the amendment, the case, etc. Patent Applicant Address: 10 Amanuma, Hiratsuka City, Kanagawa Prefecture Name: Nissan Shatai Co., Ltd. 4: Agent: 103 Telephone: 669-4421j Principal:
Kichimotobashi Kakigara-cho, Chuo-ku, Tokyo]-13'-125, Specification subject to amendment and Drawing 6, i+ti correct content (1) The full text of the specification will be amended as shown in the attached sheet. (2) Amended g books as shown in Figure 1 of the drawing attached with Drawing B.
J, to R. Add Figures 2 to 4. ,゛-21. C Specification ■ Title of the invention Surplus adhesive removal method and device 2 Claims (1) A thermosetting adhesive is filled in the mutually overlapping portions at the joints of vehicle body panels, and the direct overlapping portions are filled with a thermosetting adhesive. Excess adhesive removal characterized by blowing hot air onto the Kurami 1 river protruding from the mold to semi-cure it, and scraping off the Jvs class A protruding from the molded part and in a semi-cured state using a scraping means. Construction method. 3. Detailed Description of the Invention - This invention provides a method for easily removing the adhesive that protrudes from the joints when bonding the joints of automobile body panels, etc. using a thermosetting adhesive. This article relates to a method and device for removing excess adhesive. Prior Art 4 A thermosetting adhesive such as a one-component epoxy adhesive is used as a structural adhesive for automobile bodies. This type of adhesive is in the form of a highly viscous paste, and it is difficult to apply a thin layer to the parts to be adhered. It often protrudes to the outer periphery. Since it becomes difficult to remove the protruding adhesive after it is heated and cured, it is necessary to remove it in advance. This excess adhesive was in the form of a viscous paste and could not be completely wiped off with a spatula or rag. Therefore, in the past, excess adhesive was generally wiped off using a solvent. However, the use of solvents poses problems in terms of work hygiene and safety.Also, solvents may degrease the area to be bonded around the wiped area, making it more likely to rust, or the solvent may enter the adhesive surface, causing the adhesive to swell and deteriorate. There was a ft. Also, using a rag was cumbersome and wasteful. SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a surplus adhesive removal method and a surplus adhesive removal device that do not require work such as wiping off surplus adhesive using a solvent. In order to achieve this object, the first invention is to fill the mutually overlapping parts of the joints of the car body panels with a thermosetting adhesive, and to remove the excess adhesive that protrudes from the directly overlapping parts. The method is characterized in that hot air is blown onto the adhesive to semi-cure it, and the excess adhesive part protruding from the molded part and in a semi-cured state is scraped off by a scraping means. Further, the second invention includes a hot air discharge nozzle that heats and hardens the surplus adhesive part protruding from the overlapping part of the panels, and a hot air discharge nozzle that scrapes the surplus adhesive part that is semi-cured with hot air from the hot air discharge nozzle. 2. The adhesive scraping member is a surplus adhesive removing device that is integrally provided with the hot air discharge nozzle. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the relationship between the excess adhesive removing device according to the present invention and a vehicle panel. In Figure 1,
1 is an excess adhesive removing device, and 2 is a door panel of a vehicle. The surplus adhesive removing device 1 includes a heater section 3. The heater section 3 has a rectangular parallelepiped-shaped grip section 3a and a cylindrical nozzle attachment section 3b integrally connected to the grip section 3a. Furthermore, a flange portion 3c is provided protruding from the outer periphery of the end portion of the grip portion 3a on the side of the nozzle attachment portion 3b. In this way, an air passage (not shown) extending from the grip part 3a to the nozzle attachment part 3b is formed in the nozzle part 3, and a heater wire (not shown) is disposed within this air passage. . A heater electric rA (not shown) is connected to this heater wire via a heater cord 4. In addition, a blower (
An air outlet (not shown) is connected via a flexible hose 5. 6 is a hot air discharge nozzle of the excess adhesive removing device 1. This hot air discharge nozzle 6 includes a nozzle body 7 and a mounting cylinder portion 8. The nozzle main body 7 is formed in an abbreviated shape from pipe parts 7a and 7b, and a flat blowing part 7c is integrally formed at the end of the pipe part 7a. This flat blowing part 7c
extends flatly in the direction opposite to the direction in which the pipe portion 7b extends, and in this flat blowout portion 7C there is a hot air outlet (not shown) extending long and thin from the extended position of the pipe portion 7a in the direction opposite to the direction in which the pipe portion 7b extends. shozu) is formed. "The two series of mounting cylinder parts 8 are integrally provided at the end of the pipe part 7b, and this mounting cylinder part 8 has a pair of tightening fixing pieces 8a.
, 8b are integrally provided. Such a mounting cylinder part 8
is fitted onto the outer periphery of the tip of the nozzle mounting portion 3b, and the tips of the pair of fastening fixing pieces 8a, 8b are connected with screws 9, as is clear from FIG. As a result, the mounting cylinder part 8 is tightened and fixed to the nozzle mounting part 3b, and the hot air discharge nozzle 6 is communicated with the air passage in the heater part 3. This is a spray scraper (adhesive scraping member) for scraping off adhesive. This soup wrapper 10 has an arc-shaped guide part]Oa and a guide part]Oa.
A blade part 10b provided at the tip of Oa, a pair of arm parts 10c integrally provided on both sides of the middle of the guide part] Oa,
10c, and side walls 10d and 10d provided on both rear sides of the guide portion 10a. Moreover, the arm part 10c. ]Oc has a semi-cylindrical mounting portion 10e, ]Oe.
A screw mounting portion 10f, ], Of is provided for the body. Attachment part 10 of such a souffler 10
By arranging the pipe portion 7a of the hot air discharge nozzle 6 between e and IOe, and connecting the threaded portions 10f, 10f with screws 11, the mounting portions 10e, 1 are attached to the pipe portion 7a.
0e is tightened and fixed. In this way, the souffle wrapper 10 is attached to the pipe portion 7a. In addition, the souffle raper 10 is placed on the side of the vibrator 7b, and the blade portion at the tip thereof, Ob, is located slightly below the lower end of the hot air discharge nozzle 6 in the figure. Note that the door panel 2 includes a pair of panels 12 and 13. One edge of the panel 12 is provided with a hemming portion 12c formed in a substantially U-shape from an edge portion 12a and a folded portion 12b, and an edge portion 13a of the panel 13 is inserted into this hemming portion 12c. Moreover, the edge 12a and the edge 1
A thermosetting adhesive layer 14 is formed between the folded portion 12b and the edge 1.3a, and a thermosetting adhesive layer 14' is formed between the folded portion 12b and the edge portion 1.3a. Adhesive layer 1 like this
4.14' - corrugated epoxy adhesives are commonly used. In the figure, 14a indicates an excess adhesive portion protruding from between the edges 12a and 13d into the space between the panels 12.
Reference numeral 48' denotes a surplus adhesive portion which protrudes to the outside from between the folded portion 12b and the edge portion 13a. Next, a method for removing excess adhesive in which the excess adhesive portion 148' of the door panel 2 is removed using two adhesive removal devices 1 will be described. The procedure for joining the panels 12, 13 of the door panel 2 at their edges is generally as follows. That is, the folded portion 12b of the panel 12 is first bent perpendicularly to the edge 12a, and a thermosetting adhesive is applied to the edge 12a to form the adhesive layer 14. , the edge 13a of the panel 13 is placed on this adhesive layer 14. Thereafter, a thermosetting adhesive is applied to the edge 13al to form an adhesive layer 14' on the edge 13a. Next, the folded portion 12b is attached to the adhesive layer 14'--as shown in FIG.
Apply adhesive and panel 1 by folding it back to 1=
The hemming work (turning work) of No. 2 is completed. Such processes are common and well known. During this step, a portion of the adhesive layer 14 forms the edge 12a. 1.3a into the space between the panels 12.13 and become a surplus adhesive part 14a, and a part of the adhesive layer 14' protrudes outside from between the folded part 12b and the edge 13a and becomes surplus. This becomes an adhesive portion 148'. Since the excess adhesive portion 14a is not visible from the outside, it does not cause any damage to the appearance. However, since the surplus adhesive layer 148' is exposed to the outside and causes damage to the appearance, this surplus adhesive layer 148'
8' needs to be removed. The following procedure is used to remove this surplus adhesive portion 148' using the adhesive removing device 1. 7- First, a blower (not shown) is operated to supply air discharged from the blower to the hot air exhaust nozzle 6 via the hose 5 and the air passage inside the heater section 3, and the supplied air is passed through the hot air exhaust nozzle 6. Dispense from the tip. On the other hand, by turning on a heater power source (not shown) and energizing the heater wire in the heater section 3, the heater wire is heated. As a result, the air supplied to the hot air discharge nozzle 6 is heated to a high temperature within the heater section 3 and becomes hot air. Next, in this state, by gripping the grip portion 3a and bringing the hot air discharge nozzle 6 close to the end of the surplus adhesive portion 148', hot air is blown onto the surplus adhesive portion 148'. This heats the excess adhesive portion 148'. Incidentally, by blowing out hot air at about 600°C from the outlet of the hot air discharge nozzle 6 and adjusting the distance between the hot air discharge nozzle 6 and the surplus adhesive part 14a', the surplus adhesive part 14a' can be heated to a temperature of 300°C to 450°C. Can be heated with hot air at ℃. On the other hand, one-component epoxy adhesives are generally used at temperatures above 300℃.
When heated at 450° C. for about 2 to 5 seconds, this liquid-type epoxy adhesive can be turned into a gel from the base 1 state to a semi-cured state. Therefore, when the surplus adhesive part 14a' is heated for 2 to 5 seconds by hot air of 300°C to 455°C discharged from the hot air discharge nozzle 6, the surplus adhesive part 148' changes from a base state to a gel state and becomes a semi-hardened state. becomes. Such heating temperature and heating time are shown as an example, and are not necessarily limited thereto. After that, the tip of the flat blowing part 7c of the hot air discharge nozzle 6 is aligned with the excess adhesive part 14a', and the flat blowing part 7
By moving the hot air discharge nozzle 6 in the direction of arrow A along the surplus adhesive part 14a' while blowing hot air from c to the surplus adhesive part 14a', the surplus adhesive part 14 is removed.
A' is sequentially semi-hardened. On the other hand, when the hot air discharge nozzle 6 is moved in this manner, the blade section]Ot+ of the soufflage flapper 10 is brought into contact with the panel 13, and one side of the blade section 10b is brought into contact with the end surface of the folded portion 12b. As a result, the soufflage raper 10 follows the hot air discharge nozzle 6, and the semi-cured part 1/Ib of the surplus adhesive part 148' is transferred to the adhesive layer 1 by the blade part ]Ob of the soufflage raper 10. 13' and scraped from panel 13'. This scraped off semi-hardened portion 14b is guided by the guide section]Oa and sequentially discharged to the rear of the souffle wrapper 10. In addition, although the blade part 10b of the souffle flapper 10 is shaped so as to touch along the upper surface of the panel 13 in the figure,
Depending on the shape of the member to be adhered, the material of the adhesive, etc., it may be possible to take into consideration the shape of the folded portion of the panel 12 shown in the figure, or the shape that fits along the edge of the panel 2a. Although the above example shows the case of manual operation, it is also possible to incorporate this into a copying traveling device or robot I-.In that case, a vacuum suction device etc. can be installed in a position that does not affect the hot air. Further, the remaining adhesives]/l, ]/I' are heated and cured when the painted portion of the door panel 2 is dried in a coating oven. In the surplus adhesive removal method described above, the excess adhesive
= After heating the adhesive part 14a' with the hot air discharge nozzle 6 to semi-cure it, the semi-cured part of this excess adhesive part 14a' is heated with the hot air discharge nozzle 6 to a spray flapper attached to the hot air discharge nozzle 6.
10, but it is not necessarily limited to this. For example, after heating and semi-curing the surplus adhesive portion 148' with the hot air discharge nozzle 6 without a sprayer as shown in FIG.
It can also be removed with a separate spatula or spatula. In addition, in the double surplus adhesive method, the surplus adhesive part 148
' is heated by the hot air discharge nozzle 6 provided with the flat blowing part 7c, but the invention is not necessarily limited to this. For example, hot air blown from the cylindrical blowing part 7c' to the hot air discharge nozzle 6 shown in FIG.
′ was heated to semi-cure the spatula 15 shown in Figure 4.
It may be removed by In addition, in FIG. 3, 16 is an air passage in the heater part 3, 17 is a heater wire in the air passage 16,
Reference numeral 18 denotes a blower connected to the blower path 16 via a hose 5. As explained above, the first invention is to fill the mutually overlapping parts at the joints of car body panels with a thermosetting adhesive, and remove the excess adhesive that protrudes from the directly overlapping parts. The excess adhesive removal method involves blowing hot air onto the area to semi-cure it, and then using a scraping device to scrape off the excess adhesive that is protruding from the molded area and is in a semi-cured state. There is no need to use a solvent as in the conventional method to remove excess adhesive that has protruded out. Therefore, various problems caused by solvents do not occur as in the prior art. Furthermore, since the excess adhesive is scraped off in a gelatinized and semi-cured state, the excess adhesive is not sticky and can be easily scraped off, allowing the excess adhesive to be removed reliably. Further, the second invention includes a hot air discharge nozzle that heats and hardens the surplus adhesive part protruding from the overlapping part of the panels, and a hot air discharge nozzle that scrapes the surplus adhesive part that is semi-cured with hot air from the hot air discharge nozzle. and an adhesive scraping member for removing excess adhesive, and the adhesive scraping member is connected to the hot air discharge nozzle.
! Since the adhesive is placed in the A position, the excess adhesive can be heated and semi-cured and the first removal process can be easily removed. 4. Brief description of the drawings Fig. 1 is a perspective view illustrating the surplus adhesive removal method and its device according to the present invention, and Fig. 2 is a perspective view illustrating another example of the surplus adhesive removal method according to the present invention. 3 and 4 are cross-sectional views illustrating still another example of the method for removing excess adhesive according to the present invention. 1. Excess adhesive removal device, 2. Door panel, 6. Hot air discharge nozzle, 10.
・・Soft scraper (adhesive scraping member), ] Ob・Blade part, 12.13・Panel, ]/1.14'
...Adhesive layer, 148'...excess adhesive part. 14-

Claims (2)

[Claims] (1) Fill the mutually overlapping parts of the joints of the car body panels with thermosetting adhesive, blow hot air on the adhesive protruding from the overlapped parts to semi-cure it, and remove the adhesive protruding from the molded parts. A method for removing excess adhesive characterized by scraping off semi-cured adhesive using a scraping means. (2) A heater section interposed in the air passage, a nozzle that discharges the hot air that has passed through the heater section and is movable in a direction perpendicular or almost perpendicular to the direction of discharge of the hot air, and integrated with the nozzle. and has a blade part for scraping off the semi-hardened adhesive at a position adjacent to the discharge port of the nozzle at a distance from each other, and the blade part moves in the direction of the discharge port as the nozzle moves. and a scraping member whose blade portion performs the scraping action when moved toward.